{"id":26414,"date":"2025-07-24T21:15:22","date_gmt":"2025-07-24T18:15:22","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresql-tablodaki-bos-satirlari-silme\/"},"modified":"2025-07-24T21:15:22","modified_gmt":"2025-07-24T18:15:22","slug":"postgresql-tablodaki-bos-satirlari-silme","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresql-tablodaki-bos-satirlari-silme\/","title":{"rendered":"PostgreSQL: Tablodaki Bo\u015f Sat\u0131rlar\u0131 Silme"},"content":{"rendered":"<p># PostgreSQL&#8217;de Bo\u015f Sat\u0131rlar\u0131 Silme: Tam Bir K\u0131lavuz<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda gereksiz yere yer kaplayan bo\u015f sat\u0131rlar m\u0131 var?  Performans sorunlar\u0131na yol a\u00e7an bu verileri temizlemek i\u00e7in do\u011fru y\u00f6ntemleri bilmek \u00e7ok \u00f6nemli. Bu kapsaml\u0131 k\u0131lavuzda, PostgreSQL&#8217;de bo\u015f sat\u0131rlar\u0131 silmenin en etkili yollar\u0131n\u0131, performans optimizasyon tekniklerini ve ger\u00e7ek d\u00fcnya senaryolar\u0131n\u0131 ad\u0131m ad\u0131m \u00f6\u011freneceksiniz.  Bo\u015f sat\u0131rlar\u0131n ne oldu\u011funu, nas\u0131l tespit edilece\u011fini ve g\u00fcvenli bir \u015fekilde nas\u0131l kald\u0131r\u0131laca\u011f\u0131n\u0131 detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z.<\/p>\n<p><strong>PostgreSQL&#8217;de Bo\u015f Sat\u0131r Nedir ve Neden Silinmelidir?<\/strong><\/p>\n<p>Bo\u015f sat\u0131r, bir tablodaki t\u00fcm s\u00fctunlar\u0131nda NULL de\u011fer veya bo\u015f string (&#8221;) i\u00e7eren bir sat\u0131rd\u0131r.  Bu sat\u0131rlar, veritaban\u0131n\u0131zda gereksiz yer kaplar ve sorgu performans\u0131n\u0131 olumsuz etkiler.  \u00d6zellikle b\u00fcy\u00fck veritabanlar\u0131nda, bu etki olduk\u00e7a belirgin hale gelir.  Bo\u015f sat\u0131rlar\u0131n varl\u0131\u011f\u0131, raporlama ve analiz sonu\u00e7lar\u0131n\u0131 da yanl\u0131\u015f y\u00f6nlendirebilir.  \u00d6rne\u011fin, bir e-ticaret sitesinin \u00fcr\u00fcn tablosunda bo\u015f sat\u0131rlar, toplam \u00fcr\u00fcn say\u0131s\u0131n\u0131n yanl\u0131\u015f hesaplanmas\u0131na ve stok y\u00f6netiminde hatalara neden olabilir.  Bu nedenle, bo\u015f sat\u0131rlar\u0131 d\u00fczenli olarak temizlemek veritaban\u0131n\u0131z\u0131n sa\u011fl\u0131\u011f\u0131 ve performans\u0131 i\u00e7in hayati \u00f6nem ta\u015f\u0131r.<\/p>\n<p><strong>PostgreSQL&#8217;de Bo\u015f Sat\u0131rlar\u0131 Nas\u0131l Tespit Ederim?<\/strong><\/p>\n<p>Bo\u015f sat\u0131rlar\u0131 tespit etmek i\u00e7in \u00f6ncelikle hangi s\u00fctunlar\u0131n bo\u015flu\u011fun g\u00f6stergesi olaca\u011f\u0131na karar vermeniz gerekir.  T\u00fcm s\u00fctunlar\u0131n NULL veya bo\u015f string olmas\u0131 \u015fart\u0131yla, a\u015fa\u011f\u0131daki SQL sorgusunu kullanabilirsiniz:<\/p>\n<pre class=\"language-sql\"><code>SELECT *\nFROM your_table\nWHERE column1 IS NULL AND column2 IS NULL AND ... AND columnN IS NULL;<\/code><\/pre>\n<p>Burada <code class=\"language-\">your_table<\/code> tablonuzun ad\u0131, <code class=\"language-\">column1<\/code>, <code class=\"language-\">column2<\/code>, &#8230;, <code class=\"language-\">columnN<\/code> ise bo\u015f olup olmad\u0131\u011f\u0131n\u0131 kontrol etmek istedi\u011finiz s\u00fctunlar\u0131n isimleridir.  E\u011fer bo\u015f string de\u011ferleri de kontrol etmek istiyorsan\u0131z, sorgunuzu \u015fu \u015fekilde d\u00fczenleyebilirsiniz:<\/p>\n<pre class=\"language-sql\"><code>SELECT *\nFROM your_table\nWHERE (column1 IS NULL OR column1 = '') AND (column2 IS NULL OR column2 = '') AND ... AND (columnN IS NULL OR columnN = '');<\/code><\/pre>\n<p>Bu sorgu, belirtilen t\u00fcm s\u00fctunlarda NULL veya bo\u015f string olan sat\u0131rlar\u0131 size listeleyecektir.  Bu sorguyu \u00e7al\u0131\u015ft\u0131rarak bo\u015f sat\u0131rlar\u0131n varl\u0131\u011f\u0131n\u0131 ve say\u0131s\u0131n\u0131 kolayca tespit edebilirsiniz.  Elbette, tablo yap\u0131n\u0131za g\u00f6re bu sorguda de\u011fi\u015fiklikler yapman\u0131z gerekebilir.<\/p>\n<p><strong>PostgreSQL&#8217;de Bo\u015f Sat\u0131rlar\u0131 Silmenin Uygulamal\u0131 K\u0131lavuzu<\/strong><\/p>\n<p><strong>\u00d6\u011frenme Yol Haritas\u0131:<\/strong><\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong><\/p>\n<p><strong>Ad\u0131m 1:<\/strong> Bo\u015f sat\u0131rlar\u0131 tespit etmek i\u00e7in yukar\u0131daki sorgular\u0131 kullan\u0131n.<\/p>\n<p><strong>Ad\u0131m 2:<\/strong>  Bo\u015f sat\u0131rlar\u0131 silmek i\u00e7in a\u015fa\u011f\u0131daki basit DELETE sorgusunu kullan\u0131n:<\/p>\n<pre class=\"language-sql\"><code>DELETE FROM your_table\nWHERE (column1 IS NULL OR column1 = '') AND (column2 IS NULL OR column2 = '') AND ... AND (columnN IS NULL OR columnN = '');<\/code><\/pre>\n<p><strong>Ad\u0131m 3:<\/strong>  Sorgunun do\u011fru \u00e7al\u0131\u015ft\u0131\u011f\u0131ndan emin olmak i\u00e7in <code class=\"language-\">SELECT COUNT(*) FROM your_table;<\/code> sorgusunu \u00e7al\u0131\u015ft\u0131rarak sat\u0131r say\u0131s\u0131n\u0131 kontrol edin.<\/p>\n<p><strong>Orta Seviye:<\/strong><\/p>\n<p><strong>Ger\u00e7ek Hayat \u00d6rne\u011fi:<\/strong>  Bir e-ticaret sitesinin <code class=\"language-\">urunler<\/code> tablosunda, <code class=\"language-\">urun_adi<\/code>, <code class=\"language-\">fiyat<\/code>, <code class=\"language-\">stok_adedi<\/code> s\u00fctunlar\u0131 bo\u015f olan sat\u0131rlar\u0131 silmek istiyoruz.<\/p>\n<pre class=\"language-sql\"><code>DELETE FROM urunler\nWHERE urun_adi IS NULL OR urun_adi = ''\n  AND fiyat IS NULL\n  AND stok_adedi IS NULL;<\/code><\/pre>\n<p><strong>Optimizasyon \u0130pu\u00e7lar\u0131:<\/strong><\/p>\n<p>* <strong>WHERE ko\u015fulunu optimize edin:<\/strong> Gereksiz s\u00fctunlar\u0131 WHERE ko\u015fulundan \u00e7\u0131kar\u0131n.<br \/>\n* <strong>\u00d6nceden bir yedek al\u0131n:<\/strong>  Veri kayb\u0131n\u0131 \u00f6nlemek i\u00e7in veritaban\u0131n\u0131z\u0131n yede\u011fini al\u0131n.<br \/>\n* <strong>K\u00fc\u00e7\u00fck par\u00e7alarda silme:<\/strong> \u00c7ok b\u00fcy\u00fck tablolar i\u00e7in, DELETE sorgusunu k\u00fc\u00e7\u00fck par\u00e7alara b\u00f6lerek \u00e7al\u0131\u015ft\u0131r\u0131n.<\/p>\n<p><strong>\u0130leri D\u00fczey:<\/strong><\/p>\n<p><strong>Performans Analizi:<\/strong>  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutunu kullanarak DELETE sorgunuzun performans\u0131n\u0131 analiz edin.  Sorgunun yava\u015f \u00e7al\u0131\u015fmas\u0131 durumunda, indeks eklemek veya farkl\u0131 bir silme stratejisi uygulamak gerekebilir.<\/p>\n<p><strong>Edge Case&#8217;ler:<\/strong>  Trigger&#8217;lar veya foreign key k\u0131s\u0131tlamalar\u0131 nedeniyle silme i\u015flemi ba\u015far\u0131s\u0131z olabilir.  Bu durumlarda, k\u0131s\u0131tlamalar\u0131 ge\u00e7ici olarak devre d\u0131\u015f\u0131 b\u0131rakabilir veya daha karma\u015f\u0131k silme stratejileri geli\u015ftirebilirsiniz.  Ancak, bu i\u015flemleri dikkatli bir \u015fekilde yapmal\u0131s\u0131n\u0131z.<\/p>\n<p><strong>\u00d6rnek:<\/strong>  Bir <code class=\"language-\">siparisler<\/code> tablosunda, <code class=\"language-\">musteri_id<\/code> s\u00fctunu yabanc\u0131 anahtar k\u0131s\u0131tlamas\u0131 i\u00e7eren bir tablo olsun. Bo\u015f sat\u0131rlar\u0131 silmeden \u00f6nce bu k\u0131s\u0131tlamay\u0131 ge\u00e7ici olarak devre d\u0131\u015f\u0131 b\u0131rakman\u0131z gerekebilir.  Bu i\u015flemi tamamlad\u0131ktan sonra k\u0131s\u0131tlamay\u0131 tekrar aktif etmeyi unutmay\u0131n!<\/p>\n<p><strong>PostgreSQL&#8217;de Bo\u015f Sat\u0131rlar\u0131 Silmenin Di\u011fer Y\u00f6ntemleri<\/strong><\/p>\n<p>Yukar\u0131daki y\u00f6ntemlerin yan\u0131 s\u0131ra, daha karma\u015f\u0131k senaryolar i\u00e7in farkl\u0131 yakla\u015f\u0131mlar da kullan\u0131labilir. \u00d6rne\u011fin,  bir <code class=\"language-\">UPDATE<\/code> sorgusu ile bo\u015f sat\u0131rlar\u0131 ba\u015fka bir de\u011ferle g\u00fcncelleyip daha sonra <code class=\"language-\">WHERE<\/code> ko\u015fuluna g\u00f6re silebilirsiniz.  Bu y\u00f6ntem \u00f6zellikle b\u00fcy\u00fck tablolar i\u00e7in daha verimli olabilir.  Ancak, bu yakla\u015f\u0131m\u0131n her zaman en iyi \u00e7\u00f6z\u00fcm olmad\u0131\u011f\u0131n\u0131 unutmay\u0131n.<\/p>\n<p><strong>Performans Optimizasyonu \u0130\u00e7in \u0130pu\u00e7lar\u0131<\/strong><\/p>\n<p>PostgreSQL&#8217;de b\u00fcy\u00fck tablolar i\u00e7in bo\u015f sat\u0131rlar\u0131 silerken performans olduk\u00e7a \u00f6nemlidir.  \u0130\u015fte performans\u0131 art\u0131rmak i\u00e7in baz\u0131 ipu\u00e7lar\u0131:<\/p>\n<p>* <strong>\u0130ndeksler:<\/strong>  Silme i\u015flemini h\u0131zland\u0131rmak i\u00e7in ilgili s\u00fctunlara indeks ekleyin.<br \/>\n* <strong>\u0130\u015flem boyutu:<\/strong> \u00c7ok b\u00fcy\u00fck tablolar i\u00e7in i\u015flemi daha k\u00fc\u00e7\u00fck par\u00e7alara b\u00f6l\u00fcn.<br \/>\n* <strong>VACUUM komutu:<\/strong>  Silme i\u015flemi sonras\u0131nda <code class=\"language-\">VACUUM<\/code> komutunu \u00e7al\u0131\u015ft\u0131r\u0131n. Bu komut, silinen sat\u0131rlar\u0131n kaplad\u0131\u011f\u0131 alan\u0131 geri kazanmaya yard\u0131mc\u0131 olur.<br \/>\n* <strong>ANALYZE komutu:<\/strong> <code class=\"language-\">ANALYZE<\/code> komutu, veritaban\u0131 istatistiklerini g\u00fcnceller ve sorgu optimizasyonunu iyile\u015ftirir.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>PostgreSQL&#8217;de bo\u015f sat\u0131rlar\u0131 silmek, veritaban\u0131n\u0131z\u0131n performans\u0131n\u0131 ve verimlili\u011fini art\u0131rmak i\u00e7in \u00f6nemli bir ad\u0131md\u0131r.  Bu k\u0131lavuzda, farkl\u0131 y\u00f6ntemleri, optimizasyon ipu\u00e7lar\u0131n\u0131 ve olas\u0131 sorunlar\u0131 ele ald\u0131k.  Unutmay\u0131n ki, her veritaban\u0131 farkl\u0131d\u0131r ve en iyi y\u00f6ntem, veritaban\u0131n\u0131z\u0131n yap\u0131s\u0131na ve boyutuna ba\u011fl\u0131 olarak de\u011fi\u015febilir.  Veri g\u00fcvenli\u011finizi sa\u011flamak i\u00e7in her zaman yedekleme yap\u0131n ve de\u011fi\u015fiklikleri dikkatlice test edin.  Daha fazla bilgi i\u00e7in [Fatih Soysal&#8217;\u0131n bloguna](https:\/\/fatihsoysal.com) g\u00f6z atabilirsiniz.<\/p>\n<p><strong>S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n<p>1. <strong>Bo\u015f sat\u0131rlar\u0131 silmek veritaban\u0131 performans\u0131n\u0131 nas\u0131l etkiler?<\/strong> Bo\u015f sat\u0131rlar\u0131n silinmesi, veritaban\u0131 boyutunu k\u00fc\u00e7\u00fclt\u00fcr ve sorgu performans\u0131n\u0131 iyile\u015ftirir.<\/p>\n<p>2. <strong>Bo\u015f sat\u0131rlar\u0131 silmeden \u00f6nce yedekleme yapmam gerekir mi?<\/strong> Evet, veri kayb\u0131n\u0131 \u00f6nlemek i\u00e7in mutlaka yedekleme yapmal\u0131s\u0131n\u0131z.<\/p>\n<p>3. <strong>\u00c7ok b\u00fcy\u00fck bir tabloda bo\u015f sat\u0131rlar\u0131 silmek ne kadar s\u00fcrer?<\/strong>  Bu, tablonun boyutuna, indekslere ve donan\u0131ma ba\u011fl\u0131d\u0131r.  \u0130\u015flemi par\u00e7alara b\u00f6lmek s\u00fcreyi k\u0131saltabilir.<\/p>\n<p>4. <strong><code class=\"language-\">DELETE<\/code> sorgusu ba\u015far\u0131s\u0131z olursa ne yapmal\u0131y\u0131m?<\/strong>  Hata mesaj\u0131n\u0131 inceleyin ve olas\u0131 nedenleri ara\u015ft\u0131r\u0131n (yabanc\u0131 anahtar k\u0131s\u0131tlamalar\u0131, trigger&#8217;lar vb.).<\/p>\n<p>5. <strong>Bo\u015f sat\u0131rlar\u0131 sildikten sonra ne yapmal\u0131y\u0131m?<\/strong>  <code class=\"language-\">VACUUM<\/code> ve <code class=\"language-\">ANALYZE<\/code> komutlar\u0131n\u0131 \u00e7al\u0131\u015ft\u0131r\u0131n.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL&#8217;de Bo\u015f Sat\u0131rlar\u0131 Silme: Tam Bir K\u0131lavuz PostgreSQL veritaban\u0131n\u0131zda gereksiz yere yer kaplayan bo\u015f sat\u0131rlar m\u0131 var?&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[644],"tags":[],"class_list":{"0":"post-26414","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-postgresql","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - 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